Martin O'Neill's bid to overturn a one-match ban from Celtic's game against Porto tonight has been thrown out by the Court of Arbitration.

Martin O'Neill's bid to overturn a one-match ban from Celtic's game against Porto tonight has been thrown out by the Court of Arbitration.

The Hoops boss was originally suspended by Uefa after he was ordered to leave the dugout by referee Hellmut Krug near the end of Celtic's 3-2 Champions League defeat against Juventus in Turin last Tuesday.

O'Neill had argued with Krug after he awarded Juventus a controversial late penalty.

The penalty, which was duly converted by Nicola Amoruso, cost Celtic a draw in their first Champions League Group E match while Juventus took the points.

But in a statement the court said: "The president of the CAS Appeals Arbitration division decided to dismiss the request for interim measures noting that the jurisdiction of CAS was not established in the present case.

"Consequently, the decision made by the Uefa Control and disciplinary body remains in force."

The decision means O'Neill is banned from the dressing room, tunnel and touchline for the Celtic Park tie.

The Parkhead club hoped an appeal to the Court of Arbitration for Sport would see O'Neill back on the touchline ahead of tonight's game.

But the Swiss court have insisted they do not have the jurisdiction to make such a decision.

Celtic chief executive Ian McLeod has described the club's inability to appeal as "astonishing".

He said: "We are in receipt of the decision by the Court of Arbitration for Sport who have indicated that this matter is outside their jurisdiction.

"We find it astonishing that we have no right of appeal in this matter as we would in any other legal matter."

Porto head coach Octavio Machado insists Uefa were right to hand O'Neill the ban. Machado said: "It's not really possible to disagree with the sentence passed by Uefa.

"They make the rules and those apply to everyone including managers, despite the frustrations managers might feel.

"These things happen and this question is a difficult one.

"But no disrespect to anyone and I don't want any confrontation, but rules are rules." Machado is looking to capitalise on O'Neill's absence from the dug-out and insists his side will be going for the win.

He added: "My team is one of tradition and experience and with that experience we are obligated to come to Celtic Park and go for the win.

"That's in no way disrespectful to Celtic. They are a dynamic team with superb supporters, but Porto will try to prevail."

The Porto coach also insists that his players will rise to the occasion in front of a full house at Parkhead.

Machado continued: "I'm very pleased to play in front of 60,000 spectators.

"In fact that's why we are in the Uefa Champions League and this helps the team live up to their expectations and they're very much looking forward to it."